CVE-2006-3251

Severity: high (CVSS 7.5 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2006-06-27 · updated 2026-06-16
Weakness: CWE-119

Description

Heap-based buffer overflow in the array_push function in hashcash.c for Hashcash before 1.21 might allow attackers to execute arbitrary code via crafted entries.

Affected products

Hashcash: through 1.20; 1.00, 1.01, 1.02, 1.03, 1.04, 1.05 (+14)

References

http://secunia.com/advisories/20800
http://secunia.com/advisories/20846
http://secunia.com/advisories/21146
http://www.debian.org/security/2006/dsa-1114
http://www.gentoo.org/security/en/glsa/glsa-200606-25.xml
http://www.hashcash.org/source/CHANGELOG
http://www.securityfocus.com/bid/18659
http://www.vupen.com/english/advisories/2006/2551
https://exchange.xforce.ibmcloud.com/vulnerabilities/27422
http://secunia.com/advisories/20800
http://secunia.com/advisories/20846
http://secunia.com/advisories/21146

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